Last jack



March l0, 1925- l B.; D. BOHANAN LAST JACK' Filed Dec. 9, 1922 PatentedMar. 10, 1925.

UNITED siuirssg Parrilwl OFFICE; l

BUDD D. BOHANAN, OF BOSTON, MASSACHUSETTS,ASSIGNOR TO THOMAS G-PLANTCOMPANY, OF BOSTON, MASSACHUSETTS, A. CORPORATION 0F MASSACHUSETTS.

LAST JACK.

Application led December 9, 1922. Serial No 605,887.

To all whom t may concer/n.

citizen of the United States, residing at Boston,

ful the in the county of Suiolk and State of Improvements in Last Jacks,of which following `is a specication. he present inventionrelatestojacks for supporting lasts on certain machines employed in theoperations of shoe making, and it consists, essentially, in theprovision of means for supporting the middle part of the last andpreventing its breaking down between the heel and toe supports under theheavy pressures applied in some of these operations. .In particular, theoperation of leveling the sole of the shoe, when performed in theautomatic machines devised for that purpose, is one which applies severebending stress to the last which supports the shoe. In such machines thejack by which the pin

lastis supported comprises two sep`v arated uprights, one of whichcarries a last adapted to enter the usual socket or thimble in the heelpart of the last and the other of which has a rest to support the toethe end of the last. y.Between these members lastis unsupported and,under the heavy pressure in leveling` the sole, is liable to fail. Thisliability is particularly great with hinged lasts, and one large causeof trouble and failure of hinged lasts in leveling machines.

expense in shoe factories has been the vention consists in the provisionof a last-` holding jack having, in addition to heel and toe supports,an intermediate or instep support arranged and operating to hold up themid age this In the drawings l igure l 1s a perspective view showing oney dle part of the 4last and prevent breakunder heavy pressureappliedagainst part of the last.v

form of my improved jack with a last in place upon it.

igure ,2 is a sectional View of the intermediater support or instep.support` on a larger scale, the saddle part of such support beingrepresented without its preferred covering or sheathoii' leather. y

Figure 3 is an elevationy of the-upper part of the intermediatessupport, as seen from the right of Figure 2. f f

Like reference` characters designate the same parts wherever they occurin all the ligures. l y

n In the drawings herewith presented, whichv represent the embodiment of`my invention in a jack for a type of automaticl leveling machinealready on the market, .the letterav represents a rigid upright which isadapted to support the toe of the last and has a rest Z) 1 is an arm orupright ywhicheXtends in a' 70 substantially vertical direction from 'apivotalv mounting on a lower ypart of `the machine (not shown here). Thearmccar-l ries a last pin cl adaptedto enter the thimble '7,1 or socketvwith .which lasts'are vcommonly 75" provided. The vpivotal mounting orvarm 'al allows it to accommodate lasts of different lengths, the toepart of each of which is placed on the rest b of the iiXed upright,asf`is well understood in this art. t j The last itself is shownat e.Thisshowing f is diagrammatic in order to indicate the purpose andutility of the invention, rather than illustrative'ot any -actualcondition be cause, when, in actual `operatiomthe last 8:5 is placed onthe jack, itis within a partially completed shoe and, therefore,enclosed and embraced by the parts of the shoe. Also the .n largemajority of the lasts which would be mounted on'such a -jack arel hingedbetween the heel and fore part and although the representation ofthelast here doesnot show the hinged construction, rI desire .it to ybeunderstood that such representation 'is ini I L tended to typify andinclude any' form Yof 95v last, whether hingedy or not.

The arm f represents a leverwhich isan adjunct of the machine and servesto lpull a down on a strap which is passedover the lasted shoe whenappliedto the jack sofas to hold it in place during the levelingoper-ation. vBut as these elements are parts of ythe iachine whichneither atl'ect the new step of the present invention noi' are aiiectedtherebythere' Lis no necessityv'iior 'liurtherj description or.illustra-tion of' them vinftliis specification. n

An rintermediate v-or instep support is proupright a, and the saddle isconnected in an adjustable manner to-th'e .pos't by ascretvy lccontained telescopieally in the post and eIlga'gedF-Wthfa nutfl whichyrests on"y thev principles may tbe made inv :other forms and topthepost- "Rotationf 'of f the" Ascrew sho Wn in Figure '2; "-Whilesparation fot the nut from the post is prevented "by afcli'p which; bylreason bf" dii'erent lengthsorv styles;Y project "more `-or 'less fromthe line betwee'nthe toe' and 'heel supports, and thus theinte'rm'jediateE supportmayfbe set to' take' initially asmuc'hasymay be"desired'of the' pressure applied to thefl'aS-t. Y

Prefer "bly'l the Saddle is pimtee 1 to' ai@ Screw. c on' a pivotfQ'injorder to accom-moli "dateitseltto" the slopeofthe instep andpostfa.daptedI tdengageathe instepbf the lastfthe 'line Vbetive'e'i'ithe 'saddle andv lower" -end'fof the' post'being nearly,A perpendicularto the line betweenthe'V last-engaging?fpartsf of s'aidftoe'fand heelsupports. l 'Y preferably, lslogit hasta'lo'ng Hanger-exL tendingtovvard^the last lhottoin andl se placedasto" resist overturningf'thosefstyles 'middlepartst fart'o on'e""sid e of 'a straight lineIbetween' tlli'rtoe and lieel eX/treiniti'es.'

In Qconstructiohf the saddle preferably .made oflcast iron', orbra`.ss,"`oi1 other" ma- I'terial e having"fsuiiicient frigidit-y, andisr ""'covered With a''sheathing s fof @leather kor' other materialWhichlis s'ft'ei'iough tola'x'r'r'nid injuring the shoe upper/on' the'ylast. The covering s shown i'nVFigu're 3 is madeof leather' l cutzand.'shape'dftfliefinfand Alit vthe concave upper side'"f"the*s`acldl^e body andfto" be lapped aroundjftlie ifla-ngesfr and7"",faiid instep, too 'iar"t"^give the 'desiredsupporu' 'It will. benoted" that fthe 'socket' j in l whichr` the lowerend ofthe pstisrse't,isl atarelaflast7 and consequently nearly into coincidence With thedirection in which pressure is eXertedv upon the last by the levelingtool When iir'operationiupon; the 'bottomv of a lasted-"shoe, l Hencethe tendency ofthe instep support to be displaced by the operatwing`pressurerof the machine, and the compfonentfot vforce then Hberneby" the"stop platea,l is relatively `'sn'iall5 Tlie"'forvvaid T4end of the slotin the stop plate u is also a stop to prevent the saddle fromy fallingtoofafr'ut ofjsplace when the last is removed.

Last supporting acks ijxhaving the saine nearly perpendicular'to thelength of the modes 'of construction?for'use with other l.. lncombination with? 'a last-isupporting'fl f" j ack comprising f a rigid'Aupright :adapted to supl'jortone: end ofthe last;fand asecond. uprightadapt'edllto supportf'the `otherl end f ot the'ilast, an vintermediate'.instep supporti consisting-ef alpostiinouiitedfat its lovveril end onAsaid rigid upright atfa relatively Alow 'pointiand asaddlemountedfon'the upper port and 'asaddleioni the vuppe'r endet`suehf-Y if 3, A last-holdingjaek Comprising' in' coin.-

bi'nation a rigid fto'e 'supportga Whollyisepav ratedshe'c'ell support,lan *intermediate instepl 2. `In combination* With""a" last-holding"supporti and a stop fixed-tothe toetsupporty in' position" to''engage-the intermediate? sup- LA last-holding jack" coi'nprisingseparated tofe'fand heelsupportsand an intermediate'supportcomprisingtti-post, asaddle instep -part *off a "last Fand "l'i'avinfg a f flange' 3 disposed fat 4one side' of such" last 'toresist V5. A'r'last#supportingv yjack comprising a 120. l l Y 'heel'support, ag toe Asupport; and an'linter f rest* fb; by tli'e"vvedg1'ng`'effect of the 'last mediate support,"said" interi'nediateg supportconsist-night ai 4post"m'oi'intedffat its' lower i end on the toesupport, a screw 'tel'escopi'cally' i contained in saidpost, anutimoi'inted on the post` 'and" engaged `-vith'saidf screwf'and lva 6.In a last supporting jack having rigid toe support and a separate heelsupport, a socket piece xed to the toe support, a slotted stop platefixed to the toe support above said socket piece, a post mounted at itslower end in said socket piece and rising through the slot of such stopplate, and a saddle mounted on the upper end of said post adapted toengage an intermediate part o the last which is mounted on said toe andheel Supports.

In testimony Whereoil I have affixed my signature.

BUDD D. BOHANAN.'

